import dayjs from 'dayjs';
import weekday from 'dayjs/plugin/weekday';
import localeData from 'dayjs/plugin/localeData';
import weekOfYear from 'dayjs/plugin/weekOfYear';
import weekYear from 'dayjs/plugin/weekYear';
import advancedFormat from 'dayjs/plugin/advancedFormat';
import customParseFormat from 'dayjs/plugin/customParseFormat';
import { noteOnce } from '../../vc-util/warning';
dayjs.extend(customParseFormat);
dayjs.extend(advancedFormat);
dayjs.extend(weekday);
dayjs.extend(localeData);
dayjs.extend(weekOfYear);
dayjs.extend(weekYear);
dayjs.extend(function (_o, c) {
  // todo support Wo (ISO week)
  var proto = c.prototype;
  var oldFormat = proto.format;

  proto.format = function f(formatStr) {
    var str = (formatStr || '').replace('Wo', 'wo');
    return oldFormat.bind(this)(str);
  };
});
var localeMap = {
  en_GB: 'en-gb',
  en_US: 'en',
  zh_CN: 'zh-cn',
  zh_TW: 'zh-tw'
};

var parseLocale = function parseLocale(locale) {
  var mapLocale = localeMap[locale];
  return mapLocale || locale.split('_')[0];
};

var parseNoMatchNotice = function parseNoMatchNotice() {
  /* istanbul ignore next */
  noteOnce(false, 'Not match any format. Please help to fire a issue about this.');
};

var generateConfig = {
  // get
  getNow: function getNow() {
    return dayjs();
  },
  getFixedDate: function getFixedDate(string) {
    return dayjs(string, 'YYYY-MM-DD');
  },
  getEndDate: function getEndDate(date) {
    return date.endOf('month');
  },
  getWeekDay: function getWeekDay(date) {
    var clone = date.locale('en');
    return clone.weekday() + clone.localeData().firstDayOfWeek();
  },
  getYear: function getYear(date) {
    return date.year();
  },
  getMonth: function getMonth(date) {
    return date.month();
  },
  getDate: function getDate(date) {
    return date.date();
  },
  getHour: function getHour(date) {
    return date.hour();
  },
  getMinute: function getMinute(date) {
    return date.minute();
  },
  getSecond: function getSecond(date) {
    return date.second();
  },
  // set
  addYear: function addYear(date, diff) {
    return date.add(diff, 'year');
  },
  addMonth: function addMonth(date, diff) {
    return date.add(diff, 'month');
  },
  addDate: function addDate(date, diff) {
    return date.add(diff, 'day');
  },
  setYear: function setYear(date, year) {
    return date.year(year);
  },
  setMonth: function setMonth(date, month) {
    return date.month(month);
  },
  setDate: function setDate(date, num) {
    return date.date(num);
  },
  setHour: function setHour(date, hour) {
    return date.hour(hour);
  },
  setMinute: function setMinute(date, minute) {
    return date.minute(minute);
  },
  setSecond: function setSecond(date, second) {
    return date.second(second);
  },
  // Compare
  isAfter: function isAfter(date1, date2) {
    return date1.isAfter(date2);
  },
  isValidate: function isValidate(date) {
    return date.isValid();
  },
  locale: {
    getWeekFirstDay: function getWeekFirstDay(locale) {
      return dayjs().locale(parseLocale(locale)).localeData().firstDayOfWeek();
    },
    getWeekFirstDate: function getWeekFirstDate(locale, date) {
      return date.locale(parseLocale(locale)).weekday(0);
    },
    getWeek: function getWeek(locale, date) {
      return date.locale(parseLocale(locale)).week();
    },
    getShortWeekDays: function getShortWeekDays(locale) {
      return dayjs().locale(parseLocale(locale)).localeData().weekdaysMin();
    },
    getShortMonths: function getShortMonths(locale) {
      return dayjs().locale(parseLocale(locale)).localeData().monthsShort();
    },
    format: function format(locale, date, _format) {
      return date.locale(parseLocale(locale)).format(_format);
    },
    parse: function parse(locale, text, formats) {
      var localeStr = parseLocale(locale);

      for (var i = 0; i < formats.length; i += 1) {
        var format = formats[i];
        var formatText = text;

        if (format.includes('wo') || format.includes('Wo')) {
          // parse Wo
          var year = formatText.split('-')[0];
          var weekStr = formatText.split('-')[1];
          var firstWeek = dayjs(year, 'YYYY').startOf('year').locale(localeStr);

          for (var j = 0; j <= 52; j += 1) {
            var nextWeek = firstWeek.add(j, 'week');

            if (nextWeek.format('Wo') === weekStr) {
              return nextWeek;
            }
          }

          parseNoMatchNotice();
          return null;
        }

        var date = dayjs(formatText, format).locale(localeStr);

        if (date.isValid()) {
          return date;
        }
      }

      if (text) {
        parseNoMatchNotice();
      }

      return null;
    }
  },
  toDate: function toDate(value, valueFormat) {
    if (Array.isArray(value)) {
      return value.map(function (val) {
        return typeof val === 'string' && val ? dayjs(val, valueFormat) : val || null;
      });
    } else {
      return typeof value === 'string' && value ? dayjs(value, valueFormat) : value || null;
    }
  },
  toString: function toString(value, valueFormat) {
    if (Array.isArray(value)) {
      return value.map(function (val) {
        return dayjs.isDayjs(val) ? val.format(valueFormat) : val;
      });
    } else {
      return dayjs.isDayjs(value) ? value.format(valueFormat) : value;
    }
  }
};
export default generateConfig;